Mathematics – Probability
Scientific paper
Mar 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994apj...424l...1d&link_type=abstract
Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 424, no. 1, p. L1-L4
Mathematics
Probability
160
Astronomical Catalogs, Big Bang Cosmology, Dark Matter, Large Space Structures, Magnitude, Red Shift, Sky Surveys (Astronomy), Star Distribution, Infrared Astronomy Satellite, Line Of Sight, Luminosity, Power Spectra, Probability Distribution Functions, Space Density
Scientific paper
We discuss a magnitude-limited redshift survey covering a region around the south Galactic pole (SSRS2). The survey includes 3592 galaxies and covers a region of 1.13 sr to a limiting mB(0) = 15.5, directly comparable to CfA2. Together, CfA2 and SSR2 cover more than a third of the sky. The northern and southern surveys are remarkably similar. Both contain voids with diameters as large as 5000 km/s. The southern survey contains the Southern Wall, similar to the northern Great Wall. The distributions of velocity dispersions for systems extracted from the SSRS2 and CfA2 surveys are also remarkably similar. For the SSRS2, an inhomogeneity-independent technique yields Schechter luminosity function parameters M* = -19.50 and alpha = -1.20 (HO = 100 h km/s/Mpc, h = 1 unless otherwise specified). The steep faint-end slope is probably attributable to bluer galaxies. By examining the normalized density fluctuations in the SSRS2 and CfA2 surveys, we suggest that the combined sample is not yet large enough to be 'fair.' There are large fluctuations in shells at 10,000 km/s.
Calderón Jesus H.
da Costa Luiz Nicolaci
Fairall Anthony P.
Geller Margaret J.
Huchra John P.
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